How much does a iPhone 4 cost with the data plan?

As of my last update, the iphone 4 is an older model and is generally not sold through major carriers or retailers anymore. If you can find one, prices can vary significantly based on condition and seller, but typically it could range from $50 to $150. If you consider a data plan, costs depend on the carrier and plan selected, usually starting around $30 to $70 per month for basic smartphone data plans.